Question 1

Which sequence of if ... else statements is incorrect?

Options :

A :

if ... else if ...

B :

if ... else ...

C :

if ... else ... else ...

D :

if ... else if ... else ...

Answer: C

Question 2

Which of the following is not a loop instruction in JavaScript?

Options :

A : for ... of

B : for ... in

C : do ... while

D : if ... else

Answer: D

Question 3

What does shadowing mean?

Options :

A : Declaring a local variable with the same name

as the previously declared global variable.

B : Declaring a global variable with the same name

as a previously declared global variable.

C : Deleting and rewriting a selected piece of program code.

D : Changing the value of a variable.

Answer: A

Question 4

A recursive function is a function that:

Options :

A : does not use global variables.

B : does not return any value.

C : uses loop instructions.

D : calls itself again while running.

Answer: D

Question 5

Analyze the following code:

let point = {x: 10, y: 20};

for (let f in point) {

console.log(point[f]);

}

What will appear on the console as a result of its execution?

Options :

A : x

y

B : 10

20

C : point

D : 10

Answer: B